Properties And Applications Of Self-assembly Systems Constructed By Ionic Liquids Surfactants And Ionic Liquids Solvents

Ionic liquids are a class of functional soft materials that have attracted much attention in the past 20years.They have the advantages of almost negligible vapor pressure,good thermal and chemical stability,and a wide electrochemical window.The combination of anions and cations to build a new functional ionic liquid is known as a"designable solvent".This paper mainly designs ionic liquids with different structures as solvents or surfactants,and studies the self-assembled architecture,properties and applications of them.The self-assembly system composed solely of ionic liquids has a wide thermal stability temperature range.The structure and performance of self-assembly systems can also be adjusted by the structure of ionic liquids.Such systems can provide nanoreactor for nanomaterial and its composites.The research of structure and performance of ILs-based self-assembles will offer important consults for developing new reaction media.As part of the National Natural Science Foundation of China(No.21473050),in this article,the main research contents are as follows:1.Aqueous microemulsion system was constructed with ionic liquid[C₁₂mim][Tf₂N]as non-polar solvent,and ionic liquid[C₁₂mim][N(CN)₂]as surfactant.The structure characterization was performed using phase diagram,dynamic light scattering and conductivity method.A microemulsion system with a suitable composition was selected as a template and a reactor,in which a composite material of Ti O₂ and noble metal nanoparticles was synthesized and characterized,and its catalysis performance for the hydrolysis of ammonia borane was discussed.2.Anionic fluorine-containing and cationic fluorine-containing ionic liquid surfactants were synthesized.The critical micelle concentration of fluorinated ionic liquid surfactants in ionic liquids was measured by surface tension method and ¹⁹F-NMR.The properties of self-assembly systems and the thermodynamic parameters during the formation process were calculated.3.Using the above-mentioned fluorine-containing ionic liquid self-assembly system as a reaction medium,a typical Cu-based metal-organic framework material(MOF)was synthesized,and the structure of the MOF material was characterized by XRD,SEM,TEM,XPS and BET methods.The potential application of these IL-based self-assembly systems in nanomaterial synthesis was discussed.